I found actually that this is not a bug, but a hardware limitation... my i7 processor needs the power from the ac (120W) to run turbo boost and higher frequencies.. On Jul 3, 2011 11:51 PM, "maulynvia" <[email protected]> wrote: > I think I have the same issue. See my posts > http://ubuntuforums.org/showthread.php?t=1793637 and > http://ubuntuforums.org/showthread.php?t=1792945 > > (Ubuntu 10.4 on 32 Bit) > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/744429 > > Title: > cpu scaling frequency limited when on ac power > > Status in “powermgmt-base” package in Ubuntu: > New > > Bug description: > Binary package hint: powermgmt-base > > I am running Ubuntu 10.10 64-bit on my laptop (i7 720qm 1.6 GHZ). > > The short story: when I am on AC, these settings are active: > governor: ondemand > cpu scaling range: 933 MHz - 1.47 GHz > > When I unplug the AC chord, these (correct) settings become active: > governor: ondemand > cpu scaling range: 933 MHz - 1.60 GHz > > The bug is that I cannot set my upper frequency value to 1.6 GHz when I am on power. > I have tried different tools (also removing them all) with no luck. > I found a forum post (http://ubuntuforums.org/showthread.php?t=1077234) where the same problem is encountered. The conclusion was that the BIOS needed an update. I have tried all versions of the BIOS for my laptop, no luck. What is exactly the dependence on the BIOS for cpu scaling (related to unplugging and plugging in the AC power chord)? > > I also reported this problem on the Ubuntu forum: > http://ubuntuforums.org/showthread.php?t=1716329 > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/powermgmt-base/+bug/744429/+subscriptions
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/744429 Title: cpu scaling frequency limited when on ac power To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/powermgmt-base/+bug/744429/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
